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Thermo King APU Control Box - No Power
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- Опубліковано 3 січ 2018
- Thermo King Tripac cab controller no power issue. I will show you how to get it back going. Super simple easy fix.
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Thanks men! Believe it or not, even 5yrs afyer this video was posted some of us out here still get great help and direction w this content.
That saved $65 - $125 shop rate for a simple fix. Awesome like always Clay
Now that was a quick and easy fix and even saved you money great job Clay.
That's good you all have apu' on the trucks ,good video and reminder .
That,s good better then dealer
2 amp fuses are a pain in the butt...My old Chevy truck took a 2 amp in the back of the radio but after replacing it a few times I got a different radio that didn't require that damn fuse...Now if you can get the drivers to check that fuse it the head unit goes out it will be a major accomplishment...Have a great day...
Mike Brown Ohio hard to get them to even put in a light bulb !
great info on the thermo king unit clay...when i find a blown fuse i like to put my fused amp meter in series in place of the fuse to measure the draw on that circuit at start up and while operating. while doing this i like to inspect and move the wiring harness from one end to the other looking to reproduce the fault. i also look for any shorts / abrasions / or splices in the wiring harness that would cause an over current or short to ground. sorry for the long winded comment but i love electrical problems.
J.C. SMITH PROJECTS 99% of the time it’s caused by vibration on the controller box fuse. There’s a ton of vibration In the head unit and there is a thermostat similar to a house thermostat and that’s usually the culprit on the fuse being blown. I have had to change no less than a hundred of those rascals. They will usually last about two years then the driver will call and say the head unit is off again. It’s really surprising with all the vibrating and rough roads there isn’t more issues with that circuit board inside the main unit but they are pretty tough.
i hope that didnt come across as i was saying that is what you should have done...that was not my intention...i just enjoy talking about electrical issues and finding them just as you do. i just wanted to share what i do when i find a blown fuse. my apologies if it came across like that. i agree....if a fuse lasts 2 years and it is that easy of a repair....a new fuse it will be!
J.C. SMITH PROJECTS oh no I’ve just spent so many hours trying to find out why they have blown before and nothing can ever seem to be traced down as to why other than age ? I don’t bother if one does blow again soon or right away I will go to hunting for them. I guess I should have explained that in the video but with 14 apu units I have learned a bunch of short cuts to them. I didn’t take it as you were trying to tell me how to do it. I just have stressed over finding the issues before and went as far as changing out a head unit and everything else but can never find it. It’s like a phone cable that runs to the control box.
@@j.c.smithprojects little late on the comment but your absolutely right. No disrespect to clay and not saying he did anything wrong but I would of put a amp clamp of some sort to read to amps. I've never seen a fuse fail on its own especially being inside.
Good deal! I would had just used the 5amp fuse but I’m a ole old law!! Thanks for sharing
But doing it the right way is best!
Brandon Jackson haha no doubt !
I hate working on APU units! It's weird you did this video because today I replaced glow plugs and an altinator on one. It's been so cold up here that I figured hell froze over. -43C last week with the wind chill. Lots of guys run APU's and Wabastos. It's good for my service truck though, I was boosting non stop over the holidays.
Geoff Clark yeah we been fighting starting issues and batteries ! Always some silly issue with those apus
Thank you for being such an awesome person!!! God bless sir🙌
Great video apparently i have bigger problems, pulled all thr fuses, they all look good, even replaced the 250 amp on the battery box, still nothing, guess i need to trace the wiring and see if its anything loose
Hope that’s all that’s wrong with mine. Thanks for yalls videos helps me out a bunch!
Thank you sooo much for the tip,just fixed mine.
Sweet ! Thanks for watching! Check our our other truck fixing videos in the playlist
Good stuff, I have replaced a ton of those 2amp fuses, the vibration of beating up and down the road under the bunk stresses those small filaments of the fuse. No biggie, swap it and carry on.
Diesel Doctor Matt I have tried to find the reason why. I’ve spent hours looking and never find anything. I’m like you I think it’s the vibration caused them to blow.
Thank You so Much Sir, 👍🏾👊🏾✌🏾🇳🇬🇺🇸
Thanx for the tutorial.
I remember when they came out with tripac e series... damn alt charge/gd Cable issues fun fun!
Bearded Seabee82 always something with them. At least with them you don’t have to have a computer to work on them
I flip the switch on the actual Apu, and it won't start up. Everything inside the sleeper is working, etc. But the unit outside won't start. It's just using the air that's already in the system to cool the sleeper. Any suggestions as to why the engine/APU won't start?
I only have one? What made the fuse blow? Two anp I know is enough for the controller but why did it blow? 🤔🤔 Great video thanks I always hated the under the bunk. I had to replace a heater core under one once. I got mad and wanted to throw the bunk board out. Pain in the head every time you bumped it and hard to keep from falling back down and prop up. Thanks for the video see you in the next one
Scott Pearson a good prop works great for holding the bunks up. I have no idea but they will blow sometimes. Usually be fine after you replace them.
Over time some of the cheaper fuses get week I believe but was just wondering if there might be something going on with it
Scott Pearson I have replaced no less than 100 of them. Spent hours looking to never find anything. Even changed it head units. They will last about two years then go out. I think it’s just vibration.
Nice video, maybe could use as a training video for new drivers, although they might not use the correct fuse which might lead to melted wirs.
mechanicmike hard to even get my guys to replace a headlight bulb !
Yeah you must drive certain vehicles in order to achieve knowledge about fuses and concepts such as the need to have the correct rating.
Thank you so much. This right here is my problem so I believe that will be the solution!
Hey that’s all good in all. That got the unit back working but my next question is what the hell was it that caused the fuse to blow to begin with?
Thanks Clay Great Tip Brother 😎👍🏼
I took mine to an electrician and he said that de board is bad or a relay, but since those are soldered to the board, can i replace them and soldered Back again or i have to buy the whole board??
I have they same APU controls and I can't find they USB connection having issues with my APU cutting off I appreciate your help love your video's do you know were it is not finding it on the mother board
'm having that issue but the fuse is not the problem, I've checked all fuses from the 50amp on the apu to the box and none of them need to be replaced. Any suggestions?
I'm getting just the main power light on but nothing else I've checked everything any ideas?
I am having a problem with the fan on back of the cab would that fuse be in the same place the Apu comes on but then shuts back off
Check power and ground on it. If the motor is bad on that fan it will kill the apu
I think mine maybe electrical cause i changed my fuse and its still not working
Thank you
That's a great fix if it's a fuse, any other ideas if it's not a fuse??
Im looking at my black box, looks nothing like yours. Totally different.
I need to why my fan isn't working, I took the fan out and bench tested it and it works
I like to measure amp pull with my fuse buddy
The thing going on with mind but my fuse Box is different
👍👍👍👍
May be obvious, but it bears repeating...a blown fuse is NEVER the cause of a problem (as was errantly stated in this video). It is a sign that something else is amiss. Further investigation is necessary to uncover the actual cause.
I'm going to try this right now..lol thanks let u know what happened
If it's not the fuse, could it be a relay?
why did it blow????
BIll A I have no clue after a year or so they will blow sometime. I think it has more to do with the vibration breaking the filament vs a wiring issue. There plenty of shaking and vibrating going on under the bunk.
Koon Trucking hello I have a truck and have one o ready. Installed. It’s not working I reconnected all the wires they disconnect after having a tire blowout and hit the apu I have power on the control box bout it won’t do any thing can you help. Please
I'm having that issue but the fuse is not the problem, I've checked all fuses from the 50amp on the apu to the box and none of them need to be replaced. Any suggestions?
Travis Hunter it could be a broken wire from under the bunk controller to the controller head itself. It may just be a bad controller. If you can check the wires with a ohm meter to make sure they are good. If they are then it’s probably the control head
Koon Trucking thanks! I will start checking!
Koon Trucking alternater rusted out, compressor seized up. 😢
2021 Kenworth fix?
I had the same thing happen and it ended up being a broken wire on the APU alternator
My name is Robert Williams rnf transportation. I have the same Apu I don't have a problem with power. But when I turn it on in a run for a few minutes and shut off the red light comes on tricking anybody help me help me with this or show video
hello i need help mine still no power even thou its not a blown fuse. any help
Would just have to look at it and run some tests. Hard to diag anything without looking at it and putting hands on it. Too many variables
What is cause that
my fuses not blown and my control panel still won’t turn on.
It maybe a broken wire to the control panel it also could be a bad panel itself. Probably have to replace it
Oh
Wait... was that a Volvo??????WTF????
Bearded Seabee82 unfortunately it is
I checked the fuses all good anything else could be
Thank you